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Tube-Plate Sealing Strategies
Candidate: Tianyu Bai(Dartmouth)
Required Hardware Components
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Interactive Operation Simulation
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Injection Process Overview
Manufacturing Engineering Workflow
A precise 5-step process ensures a void-free hermetic seal within the 0.1 mm annular gap.
01
Plasma
Activation
Activation
02
Vacuum
Degassing
Degassing
03
L-Type
Dispensing
Dispensing
04
Stepped
Curing
Curing
05
Integrity
Test
Test
Structural Integrity & Safety Margins
Validation based on First-Principles of solid mechanics and ASTM standards.
SAFETY FACTOR
3846x
Against 5-psi Purge
ANNULAR GAP
100µm
Eccentric Tolerance
BURST LIMIT
19kpsi
Exceeds 316SS Limit
AUTOCLAVE TEMP
121°C
Thermo-Mechanical Stable
LUMEN PATENCY
100%
Zero Internal Flash / Clean
STERILIZATION
EtO
/ Steam
Single-Use Consumable
THERMO-MECHANICAL COMPATIBILITY VERIFICATION
316 Stainless Steel (Substrate)
16.0 µm/m·°C
EP42HT-2Med (Adhesive Seal)
~45.0 µm/m·°C
Result: The ΔCTE induces a thermal shear stress of only 312 psi at 121°C, maintaining a 6.4x safety margin below the material's 2,000 psi shear limit.
Strategic Mechanism Analysis
Feasibility evaluation of sealing modalities relative to the 1 mm spatial limit and 0.1 mm eccentricity.
Laser Welding 💥
Physics: Metallic lattice fusion
LOW: Gap Sensitive (0.1mm)
Elastomeric (O-Ring)
Physics: Elastic recovery
CRITICAL: 1mm Height Limit
Mechanical Swaging 🗜️
Physics: Hertzian stress
CRITICAL: Collapse Risk
Polymer Bonding 🧬
Physics: Capillary dynamics
✓ OPTIMAL SELECTION
Sealing Material: Master Bond EP42HT-2Med
The injection process utilizes EP42HT-2Med, a medical-grade epoxy known for high-temperature resistance and superior biocompatibility.
Mix Ratio (A to B)
100 : 40
By Weight
Working Life
45 - 75 min
@ 75°F (100g batch)
Tensile Lap Shear
> 2,000 psi
Al to Al bond
Sterilization
100+ Cycles
Autoclave, EtO, Gamma
Quality Validation & Standards
Strict adherence to international standards for neurosurgical sterile integrity.
ASTM F2095
Pressure Decay Testing for macro-leak monitoring.
ASTM F1929
Dye Penetration to expose capillary micro-voids.
He Mass Spec
Sensitivity to 10⁻⁹ mbar (Molecular hermeticity).
ISO 10993-5
Cytotoxicity standard to ensure biocompatibility.